Serving machine for wrapping wire



March 20, 1962 w. s. PEARSON SERVING MACHINE FOR WRAPPING WIRE 4 Sheets-Sheet 1 Filed Nov. 3, 1960 INVENTOR.

ln/i [ham 5. Pt'afjO/L BY MAM TORNEYS March 20, 1962 w. s. PEARSON 3,026,061

SERVING MACHINE FOR WRAPPING WIRE Filed Nov. 3, 1960 4 Sheets-Sheet 2 h INVENTOR. I 14/1]! dam 5. Pearson,

March 20, 1962 w. s. PEARSON SERVING MACHINE FOR WRAPPING WIRE 4 Sheets-Sheet 3 Filed Nov. 3, 1960 70 WORM 72 IN V EN TOR.

William .5. Pea-r: on

BY A ATTORNEYS March 20, 1962 w. s. PEARSON 3,026,061

SERVING MACHINE FOR WRAPPING WIRE Filed Nov. 3, 1960 4 Sheets-Sheet 4 INVENTOR. William 5. Pearson M W WI TTORNEYS United States Patent 9 3,026,061 SERVING MACHINE FOR WRAPPING WIRE William S. Pearson, 5821 Clearspring Road, Baltimore, Md. Filed Nov. 3, 1960, Ser. No. 66,950 17 Claims. (Cl. 242-1295) This invention relates generally to methods and apparatus for fabricating wrapped wire and more particularly relates to improvements in a serving machine for paper-wrappin g wire.

In accordance with the principles of the present invention, a serving machine for paper-wrapping wire is provided wherein a pay-ofi stand carries a reel of unwrapped wire and the wire is directed through guide means past a wrapping station whereupon a take-up reel receives the wrapped wire. It is specifically contemplated by the present invention to provide an improved pay-off stand construction to quickly and conveniently handle the heavy and cumbersome pay-off reels of unwrapped wire. Specifically, the reel mounting comprises an angled stand and an angled reel shaft telescopically related therewith, whereupon by swinging movement the reel may be elevated from a first loading position and swung into a second operating position. Locking means are also located between the telescopically related parts to lock the parts in adjusted angular position.

The machine of the present invention is also particularly characterized by an improved traverse mechanism for evenly distributing the wrapped wire on the take-up reel. In this connection, the traverse mechanism is characterized by the use of a helically wound coil so the wrapped Wire may be led through the coils and upon rotation of the coils the wrapped wire will be adjusted through a traverse corresponding to the width of the takeup reel to evenly distribute the wrapped wire on the takeup reel. The coils are rotatably driven through a reversing mechanism, thereby to alternate the direction of rotation of the coils and eliecting uniform distribution of the wrapped wire on the take-up reel.

It is an object of the present invention to provide an improved serving machine and method of handling the paper wrapping of wire.

Another object of the present invention is to provide an improved pay-off stand for a serving machine for paper-Wrapping wire.

A further object of the present invention is to provide an improved stand for handling heavy cumbersome reels and wherein a reel of the type having a flange hub may be quickly and conveniently moved from a loading position to an operating position.

Yet another object of the present invention is to provide a serving machine for paper-wrapping wire having an improved traverse mechanism.

A still further object of the present invention is to provide a novel use for a helically coiled rod as a traverse mechanism in a reel winding arrangement.

Still another object of the present invention is the provision of a traverse mechanism for a reel winder wherein a helically wound coil is alternately rotated to control the v uniform distribution of wire, or any other elongated object on a take-up reel.

Many other advantages, features and additional objects of the present invention will become manifest to those versed in the art upon making reference to the detailed description which follows and the accompanying sheets of drawings in which a preferred structural embodiment of a serving machine capable of practicing the methods contemplated herein is shown by way of illustrative example.

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On the drawings:

FIGURE 1 is a front elevational view of a serving machine for paper-wrapping wire embodying the principles of the present invention;

FIGURE 2 is an exploded view which is partly fragmentary and which illustrates structural and functional features of the reel stand employed in accordance with the principles of the present invention;

FIGURE 3 is a front elevational view of the assembled device of FIGURE 2 and showing the reel swung into an operating position;

FIGURE 4 is a fragmentary broken view partly schematic and illustrating a side view of the machine of FIGURE 1 to illustrate details of the traverse mechanism and the apparatus associated therewith;

FIGURE 5 is a fragmentary elevational view of the helically wound traverse rod incorporated in the mechanism of FIGURE 4;

FIGURE 6 is a view somewhat similar to FIGURE 4 but showing the parts in a different position of adjustment;

FIGURE 7 is an end elevational view showing the reversing gears of the mechanism of FIGURES 4 and 6; and

FIGURE 8 is a view taken on the line VIIIVIII of FIGURE 7 and is fragmentary in nature since the view, in effect, looks in to the reversing mechanism as shown in FIGURES 4 and 6 and illustrates additional details of construction.

As shown on the drawings:

A serving machine for paper-wrapping wire is shown generally at 10 and comprises a frame providing a bed 11 carried on spaced uprights 12 and 13.

A pay-off reel 14 is supported at a reel mounting station indicated generally at 16 and upwrappedwire paid ofi from the reel 14, shown generally at 7V, is directed through a socket for threading over an idler pulley 17 rotatably mounted on a shaft 18 supported by a bracket 19 carried on the frame of the machine and arranged to guide the wire W in a changed direction.

From the pulley 17, the wire W passes through a wrapping station superjacent the bed 11 of the machine. There is provided a rotatably driven spider 20 carried on hearing B mounted on springs 25 in order to absorb uneven load due to unbalanced paper. The spider 20 has end members shown respectively at 21 and 22 and between which there is carried longitudinally extending arms 23 carrying pads shown respectively at 24 and 26, the pads constituting flanged reels of paper wrapping and from which the paper is drawn to wrap around the wire passing through the wrapping station.

The wrapped wire emerges at the right-hand side of the machine, as shown in FIGURE 1, and passes over a capstan 35 operating at a definite ratio to the spider or flier 20, whereupon the Wire passes downwardly through a traverse mechanism shown generally at 28 and on to a take-up reel 29.

The entire apparatus is motor-driven, for example, by electric motors regulated through appropriate circuitry including a switch box 30 having a switch actuator 31.

Turning now more specifically to the structural and functional features of the reel mounting apparatus 16, it will be noted from reference to FIGURES 2 and 3 in conjunction with FIGURE 1, that the machine contemplates the utilization of a pay-oil reel 14 of a conventional type and including a hub 32 formed with first and second flanges indicated at 33 and 34, respectively. The hub axis is characterized by the provision of an appropriate reel axle bore shown at 36 and through which may be extended a reel axle shown at 37. The reel axle 37 is a straight cylindrical part of elongated cylindrical configuration including spaced end portions idnetified for better reference at 3-8 and 39.

Projecting inwardly of the machine from the upright 12 is a mounting pad 40 fastened as at 41 in firm assembly to the upright 12 and having at an apical portion 42 a generally cylindrical support member 43. The support member is disposed generally uprightly but is inclined angularly as shown particularly in FIGURE 2 in the direction of a loading station forwardly of the machine 10.

The support member 43 is intended to comprise one part of a telescopic assembly. Thus, in the illustrative embodiment herein described the support member 43 takes the form of a generally tubular member having a hollow bore extending downwardly thereinto. At the top of the support member 43 there is attached in firm assembly a first collar 44 presenting an angularly inclined annular surface 46 as an abutment surface for engagement with a similar annular surface 47 formed on a collar 43 carried by the other part of the telescopic assembly, namely, a rod-like shaft member 49.

Thus, the rod-like shaft member 49 is received in telescopic assembly within the support member 43 and enters thereinto until the surface 47 of the collar 48 engages against the surface 46 of the collar 44.

To adjust the extent to which the shaft member 49 is received within the support member 43, the collar 48 may be adjusted along the length of the shaft 49. To efiect that end, a suitable set screw 50 is threaded into the collar '3 and engages against the shaft part 49.

At the upper end of the shaft part 49, there is formed a bearing member '51 having a bearing bore 52 formed therein and disposed on a generally horizontal axis when the bearing member is extended in a direction forwardly of the machine towards the loading zone. Such disposition is eifected because it will be noted from an inspection of the drawings the bearing member 51 is in the nature of an L fitting and includes a coupling portion 53 connected in co-rotatable assembly with the shaft part 45. Around the edges of the bore 52, the bearing part 51 is formed with an annular surface 54.

When it is desired to load a reel 14 on the reel mounting mechanism, the loaded reel is merely positioned in the loading station forwardly of the machine and the shaft part 49 is adjusted to the proper height by fixing the collar 48 along the length thereof, whereupon the bearing bore 52. will be placed in register with the axle bore 36. The axle 37 is then passed through the bore 36 and the end 33 thereof is received within the bearing bore 52.

Because of the relationship between the axle 37, the

bearing member 51 and the shaft 49, it will be appreloading position suggested in FIGURE 2 through an are shown by the arrows in FIGURE 3 at 56 and into the working position or operating position depicted in FIG- URE 3. By so swinging the reel, it will be noted the reel 14 is elevatedoif of the support surface and into a proper position to pay off wire into the serving machine 10.

In order to lock the reel in working or operating position, the bearing member 51 is formed with a boss 57 suitably apertured to pass a pin or rod 58 having a handle portion 59. The pin or rod '58 passes through an appropriate opening formed in the collar 48 and seats within a recess 60 formed in the collar 44.

The inclined working position of the reel 14 not only leaves the reel to pay off smoothly, but also gives an automatic braking action when the machine is stopped. As is well known, the heavier the reel, the greater the inertial forces. Accordingly, the heavier the weight acting against the surface 54 ofthe bearing member 51, the less the tendency of a free wheeling action occurring when the machine is stopped and it is desired that the pay-off reel stop.

In FIGURES 2 and 3, the socket is clearly shown through which the wire W passes from the pay-off reel 14 and such socket is identified at 61. It will be noted the socket 61 is disposed between the pay-01f reel and the pulley 17 and is preferably carried by the upright 12 as a part of the frame of the machine.

Referring now to FIGURES 4-8 in conjunction with FIGURE 1, the improved traverse device of the serving machine is shown as comprising a helically wound rod 62 shaped to form a plurality of separate coils disposed around a center axis. As shown in FIGURE 5, one end of the rod is secured to a bracket 63, while the other end of the coil is secured to a bracket 64. Extending between the brackets 63 and 64 is a center stem 66 which lies on the axis of the coils formed by the helically wound rod 62. The spacing dimension between the brackets 63 and 64 preferably exceeds the widest spacing dimensions between the flanges of a take-up reel. In this connection, it may be observed that the take-up reel 29 will be understood to be of a conventional construction including a hub 67 formed with spaced flanges 68 and 69 and characterized by an axle bore 70 through which extends a reel axle 71.

The torque limiter 27 acts as an overload protection mechanism and includes a flanged plate driven by a worm 72 at the top of the machine and which plate is cooperable with friction disks to give an even tension on the take-up reel 29 during the operation thereof.

In FIGURE 4 of the drawings, the torque limiter is shown in operative association with a speed transmission. Thus, the shaft 71 for the take up reel 29 is driven by a belt 73 connected to the torque limiter 27 and a pulley 74 is associated with a V belt 76 to drive an input pulley 77 of a speed transmission shown generally at 73. The speed transmission 78 may conveniently take the form of a conventional variable pulley drive and is shown as including an output pulley 79 driving a V belt 80 and which is trained over a variable pitch pulley 81 of the type which permits speed variations of approximately 30%.

The pulley S1 drives a center pinion 82 of a reversing mechanism shown generally at 83.

As shown on FIGURE 7 which illustrates the reverse end of the reversing mechanism, the center pinion 82 has connected therewith a toothed gear 34 meshing with a gear 86 and also meshing with a gear 87 which constitutes anidler gear to, in turn, rotatably drive a gear 88 in a rotational direction opposite the gear 86. Each of the gears 86, 87 and 88 are journaled for rotation on a floating plate 89 which floats on the center pinion 82 and may be journaled thereon by a bronze bushing.

As will be particularly illustrated by examination of FIGURES 7 and 8, the floating plate 89 has on the peripheral surface thereof protruding lugs forming a first stop shoulder 90 and a second stop shoulder 91. The shoulders 90 and '91 are at diametral opposite positions and are on opposite axial sides of the plate 89 which is, in effect, somewhat disk-shaped in overall configuration.

One of the other of the gears 86 and S8 meshes with a driven gear 93 carried on a shaft 94 and jonrnaled in a bearing bracket 96 positioned on the outside of the upright 13 constituting a part of the frame of the machine 19. The shaft 94 extends through the upright 13 and is connected to the bracket 63 for rotatably driving the helically wound rod 62.

In order to effect automatic shifting of the reversing mechanism and to therefore alternately drive the helically wound traverse rod 62 in opposite directions, there is provided a shifting plate 97 pivotally mounted on a pin as at 93 which is preloaded by a biasing means such as a coil spring 99. A tongue 1% formed on the plate 97 is provided with an elongated slot 161 to receive an offset lug 162 formed on an actuating rod 103.

The plate 97 is further characterized by a stop lug 104 which engages one or the other of the stops 90 and 91.

In FIGURE 4, the stop 91 is shown engaged against the stop lug 104, while in FIGURES 6 and 8, the lug 104 is shown engaged against the stop 90. It will be understood that pivotal displacement of the plate 97 on the axis of the pin 98 will shift the lug 104 between two positions corresponding to a first blocking position relative to the lug 90 and a second blocking position relative to the lug 91. Thus, the floating plate 89, depending on the position of the lug 104, will be free to rotate with the pinion S2 and move one or the other of the gears 88 or 86 into meshing engagement with the gear 93, thereby to rotate the helically wound rod 62 in alternate directions.

The actuating rod 103 extends through the upright 13 and lies adjacent the helically wound traverse rod 62. Stop members 106 and 107 are slidably carried on the rod 103 and may be adjustably positioned and locked by means of set screws 108 and 109, respectively. A rod preferably projects from each of the locking members 106 and 107 below and under the helically wound rod 62 to form a sensing rod 110 (FIGURE 4) engageable with the wire W. Thus, the stop members 106 and 107 can be adjusted within the limits of the axial length of the helically wound rod 62 to prescribe the limits of the traverse controlled thereby.

As will be evident from the drawings, the wrapped wire W passes downwardly and the transversely disposed coils of the rod 62 engage the wire so that upon rotation of the rod 62 the wire will be adjusted within the limits of the traverse preestablished through adjustment of the stop members 106 and 107. As soon as the wire W en gages one of the sensing rods 110, the rod 103 is shifted to actuate the shifting plate 97 and to move the lug 104 in and out of register with a corresponding one of the shoulders 90 and 91. It will be appreciated that if it were not for the studs or stops 90 and 91, the floating plate 89 and the gear cluster would revolve aimlessly. However, an appropriate stop 90 or 91 comes into engagement with the lug 104 and the gear cluster will make a half revolution permitting the gear 93 to be rotatably driven for rotating the helically wound traverse rod until the gear cluster is again repositioned for rotation of the gear 93 in an opposite direction.

Although the upright 13 has been referred to generally, it will be noted particularly in reference to FIGURE 5 that the upright 13 may comprise spaced plate members, the right-hand plate member bearing the reference numeral 13 in FZGURE 5 and the left-hand plate member being shown at 111. There is thus provided bearing support for the rod 62 and sliding support for the rod 103. 7

Although minor modifications might be suggested by those versed in the art, it should be understood that I wish to embody within the scope of the patent warranted hereon all such modifications as reasonably and properly come within the scope of my contribution to the art.

I claim as my invention:

1. A serving machine for paper-wrapping wire comprising, a frame having a base, a pay-ofi stand in said base comprising a generally upright cylindrical support inclined forwardly of the machine, said support having a recessed bore extending downwardly into said support, a collar at the upper end of said support, a journal member comprising a rod received in said bore and being angularly adjustable therein, locking means between said collar and said journal member to retain said rod in adjusted angular position, a bearing member connected to the end of said rod and having a recessed bearing bore extending in angular offset relation with respect to the axis of said rod, a reel shaft insertable in said bearing bore, whereby a loaded wire reel having a hub formed with a reel shaft bore may be positioned adjacent said nay-off stand and said reel shaft inserted through said reel shaft bore into said bearing bore, whereupon the reel together with the bearing member and said rod is angularly shifted to elevate the reel to an inclined position suitable for paying off the wire on the reel smoothly, a socket carried by said frame above and to one side of said pay-oft stand through which the wire is threaded, an idler pulley on the end of said frame over which the Wire is threaded to guide the wire in a changed direction, means forming a winding station on said machine including at least one winding pad rotatably driven on a generally horizontal axis above the level of the pay-off stand, means guiding the wire horizontally through said winding station for paper-wrapping the wire, a capstan at the opposite end of the machine for advancing the wire through the machine and for directing the wrapped wire downwardly, a traverse mechanism through which the wrapped wire passes, and a take-up reel subjacent said traverse mechanism and adjacent said pay-off stand for winding up the Wrapped wire, said traverse mechanism comprising a helically wound coil having its opposite ends connected to spaced apart collars intersected by a center stem, said helically wound coil being disposed transversely of the path of the wrapped wire and operative to guide the wrapped Wire over an adjusted traverse, driving means to rotate said coil including a reversing device, and an actuator having limit stops at spaced points along the length of said coil, thereby to prescribe the limits of the traverse and actuating the reversing device to change the direction of rotation of the coil alternately.

2. The use of a helically wound coil as a traverse device which includes the steps of advancing an elongated member to be reeled up through the coils, rotatably driving the helically wound coil in one direction to adjust the elongated member through a traverse corresponding to a selected axial length of coils, and reversely rotating the helically wound coil in an opposite direction to adjust the elongated member in an opposite direction.

3. Means for reeling up an elongated member comprising a traverse device including a helically wound rod forming a plurality of coils, mounting means rotatably supporting said rod with the coils thereof disposed transversely of the elongated member to engage the coils thereagainst, driving means for rotatably driving the coils, thereby to adjust the transverse position of the elongated member, and said driving means including reversing mechanism for selectively reversing the direction of rotation of the coils, said reversing mechanism including actuating means having stop members spaced along the length of said helically wound rod and engageable with the elongated member, thereby to actuate the reversing mechanism and reversely rotate the coils.

4. Means for reeling up an elongated member comprising a traverse device including a helically wound rod forming a plurality of coils, mounting means rotatably supporting said rod with the coils thereof disposed trans versely of the eiongated member to engage the coils thereagainst, driving means for rotatably driving the coils, thereby to adjust the transverse position of the elongated member, and said driving means including reversing mechanism for selectively reversing the direction of rotation of the coils, said reversing mechanism including actuating means having stop members spaced along the length of said helically wound rod and engageable with the elongated member, thereby to actuate the reversing mechanism and reversely rotate the coils, said stop members being adjustably positioned to vary the traverse controlled by the coils.

5. A stand for a reel of the type having a flanged hub with a reel axle extending through the hub comprising a cylindrical support member positioned generally uprightly and inclined in the direction of a loading zone, a first collar at the upper end of said support member forming a flat end face, a rod-like member shaft received in said tube and having a second collar carrier thereby providing a flat end face engageabie with said fiat end face of said first collar, thereby to dispose said rod-like shaft member in coaxial alignment with the support member and confining the rod-like shaft member for angular adjustment, and a bearing member on the end of said rod-like shaft member having a bearing bore offset on an angle relative to the axis of said support member and said rod-like shaft member and sized and positioned to receive and journal the reel axle at a first loading position with the rod-like shaft member in one angular position of adjustment, and effective to elevate the reel into a second operating position when the bearing member is angularly shifted together with the rod-like shaft member in the support member.

6. A stand for a reel as defined in claim 5, said second collar being adjustably positionable on said rod-like shaft member to adjust the effective height of said bearing member.

7. A reel stand comprising a reel axle disposed on a generally horizontal plane in a first position with the reel supported by its flanges on a generally horizontal support surface, a stand member at one end of said reel axle oflset angularly to extend generally downwardly and away from said reel axle when in said first position, an elongated support member carried on the support surface and extending generally uprightly but disposed on an axis at an angle complementary to the angle of said stand member, said stand and support members comprising a telescopically related parts, whereupon swinging said reel axle around the axis of said support member will move the reel olf of the support surface and will elevate and swing the reel to an operating position on said reel stand.

8. A reel stand as defined in claim 7, and separate collar members on said telescopically related parts to form interengaging abutment surfaces slidable with respect to one another upon angular adjustment of the parts.

9. A reel stand as defined in claim 8, said collar members on the innermost of the telescopically related parts being axially adjustable, thereby to variably accommodate reels of different sizes.

l0. A ree stand as defined in claim 8, said collars each having openings formed therein and pin means cooperable with said openings to lock the parts in angularly adjusted positions.

11. The use of a helically wound rod as a traverse control for a serving machine which comprises the steps of reeling wrapped wire onto a take-up reel, directing wrapped wire through the transversely disposed coils of a helically wound traverse rod positioned ahead of the take-up reel, and alternately rotating the helically wound traverse rod in opposite directions to control the traverse of the wrapped wire as it is reeled up on the take-up reel.

12. in a sewing machine, a traverse rod helically wound to form a plurality of coils and disposed to have a Wire pass through the coils, means for rotatably driving the traverse rod, and a reversing mechanism comprising an input pinion, a floating plate on said pinion free to rotate therewith, a pair of diametrically opposed studs on said plate spaced axially with respect to one another, a gear cluster on one face of said plate including a first gear driven by said pinion, a driving gear meshing with said first gear and a second gear driven from said first gear through an idler gear to reverse the direction thereof and a shifting plate to control the rotation of said floating plate, said helically wound coil having a gear connected therewith selectively meshing with the driving gears for alternately rotating the helically wound rod in opposite directions.

13. In a machine having a take-up reel for reeling up 'a flexible wire-like member, the improvement of a traverse mechanism for insuring uniform distribution of the wirelike member on the'take-up reel comprising a traverse rod shaped toform a plurality of helically wound coils and being disposed to direct the wire-like member through the coils in transverse direction, whereupon rotation of the coils in alternate direction will position the wire-like member on a traverse prescribed by the coils, and rotatable driving means for alternately rotating said traverse rod in opposite directions.

14. In a machine having a take-up reel for reeling up a flexible wire-like member, the improvement of a traverse mechanism for insuring uniform distribution of the wire-like member on the take-up reel comprising a traverse rod shaped to form a plurality of helically wound coils and being disposed to direct the wire-like member through the coils in transverse direction, whereupon rotation of the coils in alternate direction will position the wire-like member on a traverse prescribed by the coils, and a drive means for said traverse rod comprising a reversing mechanism having a pinion shaft rotatably driven, a floating plate journaled on said pinion shaft, said floating plate formed with first and second diametrically opposed axially spaced stop lugs, a gear cluster projecting axially from one face of said floating plate for selective meshing engagement with a driven gear connected to said traverse rod, said gear cluster including a pinion gear corotatable with said pinion shaft and a pair or" driving gears for meshing with said driven gear, one of said driving gears directly meshing with said pinion gear and being rotatable in one direction, the other of said driving gears meshing with said pinion gear through an idler gear, thereby to rotate in an opposite rotational direction, and a shiftable member having a stop movable therewith positioned in selective register with said first and second stop lugs, and actuating means for shifting said shiftable member in response to the wire-like member moving to opposite ends of the traverse rod, whereby said floating plate will be angularly displaced within the limits prescribed by said first and second stop lugs and will-engage a corresponding one of said driving gears with the driven gear to alternately rotate the traverse rod in opposite directions.

15. A serving machine for paper wrapping wire comprising a rotatably driven spider having end members, longitudinally extending arms between said end members, and pads constituting flanged reels carried by said arms in balanced relation to the axis of rotation, said machine comprising further a pay-off reel below the level of said spider, and a pulley rotatably carried on said machine to guide Wire through the spider in changed direction from the pay-off reel.

16. A serving machine for paper wrapping wire comprising a rotatably driven spider having end members, longitudinally extending arms between said end members, and pads constituting flanged reels carried by said arms in balanced relation to the axis of rotation, said machine comprising further a pay-off reel below the level of said spider, and a pulley rotatably carried on said machine to guide wire through the spider in changed direction from the pay-off reel, said machine further including a take-up reel and a traverse mechanism receiving wrapped wire from the spider and feeding it onto the take-up reel.

17. A serving machine for paper wrapping wire comprising a rotatably driven spider having end members, longitudinally extending arms between said end members, and pads constituting flanged reels carried by said arms in balanced relation to the axis of rotation, said machine comprising further a pay-oil reel below the level of said spider, and a pulley rotatable carried on said machine to guide wire through the spider in changed direction from the pay-oil reel, said machine further including a take-up reel and a traverse mechanism receiving wrapped wire from the spider and feeding it onto the take-up'reel, said traverse mechanism including a helically wound transversely disposed alternately rotatable coil through which the wrapped wire passes and by means of which the traverse of the take-up reel is controlled.

(References on fell wing page) References Cited in the file of this patent 2,041,812 UNITED STATES PATENTS 5 222 1,627,188 Lightfoot May 3, 1927 1,984,405 Fantone et a1. Dec. 18, 1934 1,988,950 Knoderer et a1. Jan. 22, 1935 109,938

10 Bouget et a1. May 26, 1936 Parvin Apr. 19, 1938 Beardslee Oct. 25, 1960 FOREIGN PATENTS Sweden June 13, 1942 

